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When electric potential is null, then the electric field intensity will be(a) 0(b) 1(c) dA/dt(d) –dA/dtI had been asked this question during an interview.Question is taken from Maxwell Law in Time Varying Fields topic in chapter Maxwell Equations of Electromagnetic Theory

Answer»

Right option is (d) –dA/dt

To explain: The electric field intensity is GIVEN by E = -GRAD(V)- dA/dt, where V is the electric POTENTIAL and A is the MAGNETIC VECTOR potential. When V is zero, then E = -dA/dt.



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